Switch-operating device for lamp-sockets.



H. E. PLUNKETT. SWITCH OPERATING DEVICE FOR LAMP sooxs'rs. APPLIOATION FILED APR.9,1910.

$ 93 Patented Dec. 27, 191 0.

I Tooll ivho'm 'it may concern:

NITED STATES PATENT oFFioE- HUGH E. PYLUNKETT, or BOSTON, MASSACHUSETTS, ASSIGNOR To JAMES BARRY, OF

- I BOSTON, MASSACHUSETTS.

SWITCH- OPERATING DEVICE FOR LAMP-SOCKETS.

Be it known that I, HUGH E. PLUNKETT, a citizen of the United States, and resident .of Boston, in the county of Suffolk and State of ,Massachusetts, have invented new j and useful Improvements in Switch-Operating Devices for Lamp-Sockets, of which the following is a sliiecilication.

This invention relates to switch operating devices for. lamp sockets, and is particularly adapted to electric lamp sockets of the type commercially known as pull sockets, in which the switch is operated for alternately turning the current on and ofi by pulling a switch operating member, which 'is usually a chain or cord.

In the accompanying drawings, which illustrate one embodiment of the invention, Figure 1 15 a side elevation, partly m section,

.showing my attachment applied to an 'incandescent electric lamp socket; Fig. 2 is a plan view of said attachment.

Referring to the accompanying drawings,

A represents an incandescent electric lam-p.

socket of an ordinary and well known style, hung to extend downwardly .as is customary, and holding a shade or globe (J in the usual manner. Ordinarily the lamp socket is provided with a short sleeve a secured to the side thereof about an aperture through which the switch operating member, or chain-pull a, extends, and vfrom the mouth of which thechain depends. \Vhen the chain is pulled downward tooperate the switch, it rubs across the-Le H opening, and also across the edge of the shade or globe if the latter of sufficient diameter to extend into the path of the chain, thus developing friction which makes the chain pull hard, and also under some circumstances subjecting the shade-or globe to danger of breaking.

The ob 'ect of the present invention is to provide a novel and im 'n'oved device for operating the switch operating member which will avoid the aforesaid objections.

B represents a tubular arm, exteriorly screw threaded asshou'n at I), so that it may be screwed into the interim'ly screw threaded sleeve (1. The upper side of the tubular arm B is cut away on top at its outer end, and the remaining lower part. is bent downward to form an integral downwardly bent bracket portion 71'. v The sides of said .bi,'a'-l et portions are folded toward each Specification of Letters Patent.

go of the sleeve Patented Dec.. 27, 1910.

Application filed April 9, 1910. Serial No. 554,555.

other to form the ears 6 between which is pivoted the lower end, of a lever D. The ilever D is preferably formed as shown in the drawings, with the lower portion between the pivot 6 and the point of attachment to the switch-operating member a, standing substantially upright, and the upper part of the lever laterally turned outward to form an outwardly extending operating portion, to the end of which an operating cord E is attached. By reason of the relative arrangement of the point of attachment (Z and the pivot I), one approximately over the other, it will be Seen that the switch-operating member a will be in a'line nearly tangent to the are of the circle described by said point of attachment and will therefore be pulled by the leversubstantially straight outward withoutmaterial deflection from its normal line. Secured to the lever D at a point opposite the opening of the tube B is a holder to which is attached the switch operating member a. In the form herein shown wherein the switch operating member consists of a chain such as is usually employed, the holder consists of a loop or bracket d provided with a notch (Z in its upper edge to engage and hold one of the links or balls of the chain a. The chain of an ordinary fixture may thus be used by simply passing it through the tube B, severing it at the required point, and lodging the end link or ball in the notched holder cl as shown in the drawings.

To operate the device the cord E is pulled downward, which swings the. lever D to the position shown in dotted lines in Fig. l and pulls the chain a. outward, thus operating the switch controlled thereby. It is not necessary. to show details of the switch which forms no part of the present inven tion and may be of any well known and approved form, which is operated by pulling a switch operating member.

hen the device is in its normal, retracted position, the tubular arm B constitutes a protectivefqitsing for the switch operating chain a prq vtenting the accumulation thereon of dust and dirt, and the tubular form of the arm renders it very stiff and strong.

I claim:

1. In combination with a lamp socket having a switch operating member, an arm secured to and extendin laterally from said socket, and a lever fu crumed at its lowerloo switch operating member,

- without material deflection.

2. In combination with a lamp socket having a switch operating member,a tubular arm secured to and extending laterall from said socket through which said sWitc operatin member passes, and a lever to which sa1d switchoperating member is attached, pivoted at theouter end ofsaid tubular arm and adapted when swung on its pivot to pull said switch operating membey 3. In combination with a lamp socket hav ing'an aperture throu hits side, a sleeve secured to the socket Smut said aperture, a tubular arm separably attached to said sleeve, a switch operating member passing through said sleeve and tubular arm, and a lever to which said switch operating memher is attached, pivoted at the outer end of said tubular arm, adapted when swung on its pivot to pull said switch operating memher.

4. In combination with a lamp socket having an aperture through its side, a screw threaded sleeve secured to the socket about said aperture, a screw threaded tubular arm separably attached to said sleeve, a switch operating member passing through bular arm, adapted when on its pivq to pull said switch operatin member.

5.. In combination with a Iamp socket having a switch"operating member, a tubular arm secured to and extending'laterally from said socket through which said switch operating member. passes, a-downwardl extending bracket at the end of said tu ular arm, and a lever ivoted at its lower end to said bracket, and operating member at a point substantially opposite the end of the tubular arm.

6. As a new article of manufacture, an attachment for lamp'sockets, comprising a wardl bent bracket ortion; a lever pivoted provided with means to enga e a cord or chain opposite the opening 0 the tubular arm, and a flexible lever-operatingmember attached-to the upper end of said lever;

attachment for lamp sockets, comprising a tubular arm, formed with an integral dow-nwardly bent bracket portion, a lever "pivand provided with a notched chain holder and a flexible lever operatin member attached to the upper end of sai lever.-

Signed by me at Boston, Massachusetts this sixth day of April 1910. HUGH E. PLUNKETT. Witnesses:

Ronnn'r GUsHMAN, CHARLES D. WoonBnnRY.

said sleeve and tubulararm, and'a lever to which said switch operating lever is attached, pivoted at the outer end ofsaid .t-u-

attached to said switch tubular arm, formed with an'integral downat its ower end to said bracketv portion, and

oted at its lower end to said bracketportion.

opposite the opening of the tubular arm,-

7. As anew article of manufacture, an 

